Install Google Authenticator

If you set up 2-Step Verification using SMS text message or Voice call and also want to be able to generate codes using the Android, iPhone, or a Blackberry, you can use the Google Authenticator app to receive codes even if you don’t have an Internet connection or mobile service.

To set this up, first you need to complete SMS/Voice setup. Then, follow the directions for your type of device explained below.

If this is the first time you have used Authenticator, select Begin setup. If you are adding a new account, choose Set up account from the app's menu.

To link your mobile device to your account:

Using QR code: Select Scan a barcode. If the Authenticator app cannot locate a barcode scanner app on your mobile device, you might be prompted to download and install one. If you want to install a barcode scanner app so you can complete the setup process, select Install, then go through the installation process. Once the app is installed, reopen Google Authenticator, then point your camera at the QR code on your computer screen.

Using secret key: Select Enter provided key, then enter the email address of your Google Account in the "Enter account name" box. Next, enter the secret key on your computer screen in the "Enter your key" box. Make sure you've chosen to make the key Time based, then select Add.

To test that the application is working, enter the verification code on your mobile device into the box on your computer next to Code, then click "Verify."

If your code is correct, you will see a confirmation message. Click "Save" to continue the setup process. If your code is incorrect, try generating a new verification code on your mobile device, then entering it on your computer. If you’re still having trouble, you might want to verify that the time on your device is correct or read about common issues.

Requirements

To use Google Authenticator on your iPhone, iPod Touch, or iPad, you must have iOS 5.0 or later. In addition, in order to set up the app on your iPhone using a QR code, you must have a 3G model or later.

Downloading the app

Visit the App Store.

Search for Google Authenticator.

Download and install the application.

Setting up the app

If you haven’t already, complete the SMS/Voice setup and enroll your account in 2-Step Verification using your phone number. You can add the Google Authenticator app only after you’ve already enrolled using your phone number.

Using Barcode: Tap "Scan Barcode" and then point your camera at the QR code on your computer screen.

Using Manual Entry: Tap "Manual Entry" and enter the email address of your Google Account. Then, enter the secret key on your computer screen into the box next to Key and tap "Done."

To test that the application is working, enter the verification code on your mobile device into the box on your computer next to Code, then click "Verify." The clock icon on your mobile device will let you know how much time is left before the verification code expires and a new one is generated.

If your code is correct, you will see a confirmation message. Click "Save" to confirm. If your code is incorrect, try generating a new verification code on your mobile device, then entering it on your computer. If you’re still having trouble, you might want to verify that the time on your device is correct or read about common issues.

Requirements

To use Google Authenticator on your BlackBerry device, you must have OS 4.5-7.0. In addition, make sure your BlackBerry device is configured for US English -- you might not be able to download Google Authenticator if your device is operating in another language.

Downloading the app

Setting up the app

If you haven’t already, complete the SMS/Voice setup and enroll your account in 2-Step Verification using your phone number. You can add the Google Authenticator app only after you’ve already enrolled using your phone number.

Enter the secret key on your computer screen next to "Enter key," select Time based from the drop-down menu, and press Save.

To test that the application is working, enter the verification code on your mobile device into the box on your computer next to Code, then click "Verify."

If your code is correct, you will see a confirmation message. Click "Save" to continue the setup process. If your code is incorrect, try generating a new verification code on your mobile device, then entering it on your computer. If you’re still having trouble, you might want to verify that the time on your device is correct or read about common issues.

Google Authenticator can issue codes for multiple accounts from the same mobile device. However, every Google Account needs a different secret key, which you will get by going through the setup process. Simply repeat the setup process for any additional accounts, using the same Google Authenticator app.